public IEnumerable <Memo> FindInRangeByLecturesHours(int from, int to)
{
if (from < 0 || to < 0)
{
throw new ArgumentException($"From/To parameter should be >= 0");
}
if (from > to)
{
throw new ArgumentException($"Parameter 'From' should be <= 'To'");
}
var entities = _repository.Find(x => x.LectureHours >= from && x.LectureHours <= to).OrderBy(x => x.LectureHours);
return(Mapper.Map <IEnumerable <Memo> >(entities.Where(x => x.UserId == _userService.CurrentUserId)));
}
